Shower plumbing question - Plumbing experts to the forum please.

Does such a shower exist which during the summer months creates hot water internally (i.e. an electric shower) and then during the winter uses hot water from the house hot water tank rather than using electricity?

We have a solid fuel rayburn which is on all of the time during the winter and produces constant hot water.

During the summer it is too hot to have the rayburn on and the only thing that we would really need hot water for is for the shower, hence the need for an electric shower. In the winter time it would be a waste of electricity though.

So rig the storage cylinder up to a collector and use the immersion to supplement the collector on cloudy days. You can even retrofit a coiled 10mm pipe inside the cylinder alongside the immersion. The solar collector works best if you've got a modern quick heating cylinder with a good debit from the coil and plenty of capacity - about 160 litres would be fine for three or four showers a day.